supplemented and simply reducing supplementation rates so that total (basal plus supplemental) minerals are ... diet. Cows store trace minerals in the liver so even if these rates are not quite adequate, short term ... simply reduce supplementation to those rates. If additional savings are needed, vitamin A could be ...

motors have electric efficiency ratings, but the higher efficiency motors have more copper windings which ... also consider the fans efficiency rating. For tunnel ventilation fans, look for a minimum efficiency ... rating of 20 cfm/watt at 0.05-inches static pressure. Tunnel ventilation and exhaust fans are rated under ...